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HoRA'rIo B. WEAVER, or HARTFORD, ooNNRc'roUr.

i Letters Patent No. 60,974, dated January 1, 1867. l

IMPROVEMENTS-IN LOOKS AND KEYS.

`To um@l wHoM 1r MAY co'NcRRN:

Be it -known that I, H. B. WEAVER, of Hartford, Hartford county, State of Connecticut, have invented an Improvement in Locks and Keys; and I do hereby declare the following to be a full, clear, and exact descrip- Ation of the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon. u

` My invention consists of a lock and key, constructed and operating in the peculiar manner fully described hereafter, so that the door to which the lock is attached may be readily opened from the inside of the room by turning the handle of the lock, but so as to compel any one outside to insert a key of peculiar construction into the handlebcfore the bolt can be drawn back by turning the said handle.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describeits'construction and operation. On reference to the accompanying drawing, which forms a part of 'this specication Figure 1 is a sectional view of my improved lock.

Figure 2, a transverse section, on the line 1 2, tig. 1.

Figures 3 and 4, face views ofthe lock, with the cover plate removed.

Figure 5 4is a section of that handle of the lock which is outside the door; and

Figure 6, a section of the same, on the line 5 6, fig. 2.

Similar letters refer to similar -parts throughout the several views.

A represents the casing of the lock, to which is fitted a cover-plate, a. A bolt, B, is arranged te slide inj grooves, formed for its reception in the casing A, and, owing to a spiral spring, b, has a. tendency to remain in the position shown in fig. 1. Adjacent to the bolt B isa plate, C, in which are formed projections fitting into` corresponding grooves formed in the bolt, so that the plate C and bolt B may have a longitudinal movementv independent of each other. l Into an opening, d, in the bolt projects a lug, e, forming part of' the bolt, a precisely similar opening, d and `projecting lug, e, being formed in the plate C. f The-re are two 'lock spindles, D and D, and on the inner end of the spindle D-, wi.thin the opening d of the bolt, are twol projections, j' f, the other end of the said spindle proj ecting through the cover-plate and being secured toa handle, E, which is intended to `be on the inside of the, door to which. the lock is attached. The inner end of the spindle D projects into and is arranged to turn in the inner end of the spindle D; and-on this spindle D', and Within the opening d of the plate-C, aref formed two projections, f f, similar to the projections ff of the spindle l). This spindle D has a recess, g, of the form shown in the trans-verse sections, figs. 5 and 6, and is surrounded by the stem of thehandle E', the latter being attached to the a'sing A by means of a collar, k, and being arranged to turn freely around the spindle D', excepting. under the circumstances described hereafter. With-in the recess of the spindle D are pivoted three or more tum-blers, F, of the bellfcrank form, and hooked at one end, as shown in the drawing; and against one armof each of these tumblers bears a spring, z', one end of which is secured to the spindle D. By the action of these springs the ends of the arms j ofthe tumbler-s have a constant tendency to remain in a recess, c, cut in the plate, iigr 1. O-n the inside 'of the case A is formed a straight bar or fence, c, the edge of which is so located that the hooked ends of the trimblers will, when in the position shown in g. 2, pass between the said fence k and the plate C. In the handle E is cut a'slot, Z, adapted to. the reception of the key G; and on each side of thev recess g ofl the spindle D are form-edgrooves, m, for the reception of the legs of the key, the latter having wards, n; nn, into which, when the key isintroduced into th'e'slot, 'tit the arms .7" of the tumbler-levers F F F. Two curved or ine-lined recesses, p p, are cut in the key, one on each edge of the saule, for a purpose described hereafter. It will be seen that the bolt B may have a backward motion independent of the plate C, but that on account of the shoulder b', iig. 1, of the bolt the plate C cannot be moved back without pushing the bolt with it. As the spindle' D is secured.A to the handle E, it-is only necessary to turn the latter in either direction in order to draw the bolt back, the inner end of the spindle Dturning upon the projecting portion of the spindle D without moving the latter, while one of the projectionsff of the former acts directly upon the edge x, iig. 1, of the opening d in the bolt, forcing the sanne back along the grooves formed for its reception in the casing A. Until the key is inserted into the slot lof the handle Ethe door is cfectually locked to any one outside the room, it being impossible to move the bolt B back by turning the handle E without using the key', inasmuch ashthe turning of the spindle D is prevented by the presence of the arms j of the tumblers in the recess k of the plate C. But if the key G- be inserted into the opening l, and forced along the grooves 'm m into the recess g of the spindle D until 'it assumes the position shown in tig. 6, and the handle be slightly turned until part of it enters one of the curved recesses, p, of the key, the letter will be held securely in its position, and the tumblers F will have been moved enough upon their pivots to lower the arms j from the recess c of -the plete C, but will not have been forced down so for es to cause the hooked ends of the tumblers to lie below the edge of the vfence 7:". If the handle E be now turned in either direction, the arms j of thc tumblers will clear the sides of the recess k, and pass under the plete C, and will also clear and pass over the top 'of the fence lc in the manner shown in iig. 2, while one of the projections f' of the spindle Dl will beer agulnst the edge y of the opening d in the plete C, and move the latter beck, together with the latch-bolt B. It will be seen that, by the use of an improper key, one or morev of the ituinblers may be so placed as to hook over the edge of the fence k', while the others may lie within 'the recess 7c of. theplate C. Or the others may be in the proper position, and still the turning of the spindle D be prevented by the hooking of the misplaced tumbler on the fence k. Any desired number' of tumblers may be used, thelley having corresponding number of wards. v

I claiin as my invention, and desire to secure by Letters Datentr1. The coxnbinotion of the two spindles D and D', the bolt B, plate C, and the tumhlers F, or their equivalents, the whole being constructed, arranged for joint operation, and applied to a lock-case, substantially as and for the purpose herein set forth.

2. The combination of the above and the fence c, the whble being constructed, Aarranged, and operating as described.

3. The bell-crank tumbler-levers F, hung to the spindle D', and arranged in respect to the recess 1c of the plete C, substantially es described. l

4. The tumblers F, arranged in respectto the slot Z, in the stem of the handle E', as described. 5. The slot in the tubular stem of the handle E', in combinetionwith notches p, in the edges of the key. In testimony whereof I heve signed my nemeto this specification in the presence of two subscribing witnesses.

HORATIO B. WEAVER.

Witnesses:

Gnol S. LINCOLN, Enos H. LANE. 

